Immediately following their devastating attack on the Mohne Dam, the specially modified Lancasters of 617 Squadron successfully breach the second of Germanys mighty western dams - the Eder, on the night of 16th / 17th May 1943. After hitting the target with pinpoint precision, pilot Les Knight and Flight Engineer Ray Grayston battle with the controls of Lancaster AJ-N in order to clear the high ground beyond the dam as a torrent of water erupts into the valley below them; the wall of the Eder Dam is rent apart and collapses.

*The value given for each signature has been calculated by us based on the historical significance and rarity of the signature. Values of many pilot signatures have risen in recent years and will likely continue to rise as they become more and more rare.

‘Doc’ Sutherland was the front gunner on Les Knight’s Lancaster AJ-N that went to the Mohne Dam, and then successfully attacked and breached the Eder Dam. Shot down four months later, he managed to evade capture and escape back to England with the help of the Resistance movements, returning through Holland, France and Spain.

Ray Grayston had been serving in 50 Squadron when he was posted to 617 Squadron in March 1943. The flight engineer of Les Knight’s Lancaster AJ-N, they attacked and successfully breached the Eder Dam, Ray was shot down on 16th September 1943, and was taken to Stalag Luft III as a POW. Sadly, we have learned that Ray Grayston passed away on 15th April 2010.